Why is my a/c cold in the morning for about 20 min, then blows warm air

SOURCE: blowing cold air

I had the same problem that I just fix by flushing the heater core out with a hose.   take the two hoses off the fire wall and put the water to it and let flush.  my heater is putting out 150 dg. F  of hot air.   I'm so excited!  i will stay warm now.

Ned C Cook

• 3433 Answers
• Posted on Jun 19, 2009

SOURCE: AC blow cold air when moving but warm air when stopped

AC system appears low on charge

SOURCE: Air conditioner blows alternate cold and warm air

check the freon level

SOURCE: pasenger vents blow warm air while driver side blows cold when ac

Check and replace the right side temp-controller.

SOURCE: Rear heater blows only cold air no matter what the

If this is equipped with a rear heater core it is probably plugged up and needs to be disassembled and cleaned out